CN110114152A - Method and apparatus for cleaning plastic material - Google Patents

Method and apparatus for cleaning plastic material Download PDF

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Publication number
CN110114152A
CN110114152A CN201780081177.0A CN201780081177A CN110114152A CN 110114152 A CN110114152 A CN 110114152A CN 201780081177 A CN201780081177 A CN 201780081177A CN 110114152 A CN110114152 A CN 110114152A
Authority
CN
China
Prior art keywords
chamber
plastic material
pollutant
tool
knockout drum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201780081177.0A
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Chinese (zh)
Inventor
弗拉维奥·普瑞威努
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Previero N SRL
Original Assignee
Previero N SRL
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Filing date
Publication date
Application filed by Previero N SRL filed Critical Previero N SRL
Publication of CN110114152A publication Critical patent/CN110114152A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/36—Devices therefor, other than using centrifugal force
    • B03B5/40—Devices therefor, other than using centrifugal force of trough type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/36—Devices therefor, other than using centrifugal force
    • B03B5/38—Devices therefor, other than using centrifugal force of conical receptacle type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B17/0412—Disintegrating plastics, e.g. by milling to large particles, e.g. beads, granules, flakes, slices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0217—Mechanical separating techniques; devices therefor
    • B29B2017/0237—Mechanical separating techniques; devices therefor using density difference
    • B29B2017/0244—Mechanical separating techniques; devices therefor using density difference in liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0286—Cleaning means used for separation
    • B29B2017/0289—Washing the materials in liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/065—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts containing impurities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/008—Wide strips, e.g. films, webs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

This application discloses a kind of methods for cleaning plastic material (P) and therefrom separate polluter (C), comprising the following steps: will clean the first-class (F of fluid (W)IN) and the plastic material (P) including pollutant (C) be provided to cleaning container (2), blender (3) generates turbulences movement in the cleaning container (2), to be mechanically decoupled the contaminated materials (C) being attached on plastic material (P), so that the first part (X1) of heavier pollutant (C) is deposited to the first bottom (4) of cleaning container (2), to carry out the first separating action of pollutant (C)；There to be the second (F of the fluid (W) of floating plastic material (P)2) first chamber (5) that is transferred to from container (2), wherein the second separating action is deposited on the second bottom (6) of first chamber (5) along with the second part (X2) of pollutant (C) and is occurred；There to be the third stream (F of the fluid (W) of floating plastic material (P)3) be transported to second chamber (7) from the first chamber (5), and pass through overflow for the output stream (F of fluid (W)OUT) extracted out together with processed plastic material (P')；The agglomerate of depolymerization floating material (P) in the transmission from first chamber (5) to second chamber (7), and to third stream (F in second chamber (7)3) and plastic material (P) apply downward pushing action (T), to promote third separating action by the way that the Part III (X3) of pollutant (C) to be deposited on the third bottom (8) of second chamber (7)；It will include the fluid (W) of precipitating and the recirculation flow (F of pollutant (C) from second chamber (7)R) removal, and by recirculation flow (FR) give to the sieve unit (U for retaining pollutant (C)S), cleaning fluid (W) is returned into first chamber (5) or second chamber (7).Disclosed herein as well is a kind of equipment for executing the above method.

Description

Method and apparatus for cleaning plastic material
Technical field
Family is come from the method and apparatus of separating plastic material, the plastic material for cleaning the present invention relates to a kind of And/or various types of pollutants of industrial waste, it is ground or reduces and fragmentate.Plastic flakes to be processed can come from Such as container, bottle, film and other post-consumer objects, once and they be cleaned, they can as regrown material again It utilizes.
Pollutant to be removed may include soil, sand, gravel, various types of dirts, label or be still attached to Other materials element on plastic flakes.
Background technique
In the process field of recycled plastic material, it is known that cleaning system provides one or more rinse baths or container, Make to be transferred together with material and the pollutant to be removed for being gathered in material in the rinse bath or container.
From device a kind of known to IT1326462, it is configured for continuous wash and had previously been reduced fragmented recycling material Material, undergoes continuous cleaning step in multiple reactors being serially connected, keeps ejected wash water continuous in inside reactor The salvage material of flowing and given quantity.
Other systems are in US4,196,019, EP0 094 282, US4,073,661, EP0 129 518 and EP0 359 It is disclosed in 106.
Particularly, US4,196,019 purpose be to provide it is a kind of for cleaning the device of the small size fragment of plastic material, Wherein the device includes an elongated tank, which is suitable for being filled into scheduled level by cleaner bath, has blade agitators, Blender horizontal extension immediately below the upper layer of cleaner bath generates stirring；Plastic flakes flow to horizontal channel, and from logical It is discharged at road by going barrel.
A kind of similar device is disclosed in US4,073,661: including horizontal stir by the insertion of small size plastic material In the water-bath for mixing the purge tank of device；The plastic flakes swum in tank are removed by the dragging of auger conveyor, wherein spiral shell Rotation conveyer is positioned partially above cleaner bath and is located at along upwardly-directed passing away.
EP0 094 282 discloses a kind of recovery system comprising multiple purge tanks, these purge tanks are logical by labyrinth type Road is connected in series and communicates with each other, wherein single purge tank is equipped with normal blade agitators；The plastics material of floating in a water bath The fragment of material is pushed by multiple rotors along passing away and is passed through impeller from bath and extracts out, and wherein these rotors are logical along discharge Road is appropriately spaced.
The system (including system disclosed above) being currently known not can solve the problem of following disclosures.
In order to separate pollutant from plastic material, its different specific gravity is usually utilized.With about the same with ejected wash water Or the plastic material of smaller specific gravity is in floating state, and there is the pollutant for the specific gravity for being typically larger than water should be deposited to appearance The bottom of device or purge tank.
Regrettably, in practice, there is the case where comparison reselection procedure principle has an adverse effect, greatly reduce whole The efficiency of a separation process.
More precisely, when that is, specific gravity is than cleaning fluid low material, can be generated a large amount of necessary when recycling low density material The product of processing.
In knockout drum, it is intended to which the agglomerate for generating plastic material is served as " raft " of floating material, is influenced compared with dense timber The fractional dose of material.Substantially, the agglomerate of this floating also acts as other than the thorough cleaning for not allowing each plastic flakes Supporting role to the pollutant of aggregation, prevents it from precipitating downwards.
Simply use be suitable for push the water surface below material with promote the blade of heavier downwash be it is inadequate, Because agglomerate can be tended to remain cohesion and compact.
Since the commercial value and its cleannes and purity of salvage material are closely related, so remaining at the end of with cleaning The percentage of residual contaminants is related, it is therefore evident that ground, it is accordingly required in particular to overcome the above problem and therefore obtain more effective Cleaning and separation process.
Summary of the invention
An object of the present invention is to improve the existing cleaning system for plastic material.
It is a further object of the present invention to provide a solution, and the solution is in addition to structurally and functionally simpler Except list, additionally it is possible to realize the more advanced purity and purification of plastic material.
Particularly, another object of the present invention is to provide a solution, which is able to solve plastic material Floating agglomerate the problem of, the thorough cleaning of agglomerate blocking member and the complete precipitating compared with heavy contaminant.
Brief description may be implemented these and its by the method according to claim 1 and equipment according to claim 10 His objects and advantages.
It particularly, in one embodiment include helical feed work since supply unit includes solving poly- promotion tool Tool, solves the problems, such as the floating agglomerate of plastic material.
The agglomerate of plastics undergoes strong depolymerization, opening and unification to act on by helical feed tool, and under being forced Drop to the depths of tank.
Agglomerate is forced downwardly protrusion in the fluid in knockout drum, with effectively with separated from contaminants.Plastic material Single part can increase significantly in volume, this advantageously results in the better separation from pollutant.When use same volume Water when, can handle a greater amount of plastics, having apparent economic advantages and reducing resulting environment influences.
It is not intended to caused by being considerably reduced as the movement that supply unit executes as adhering to microvesicle at the surface of the particles Hydro-planing influence, usually solved by chemical addition agent.
Due to especially including the towing and recycling device of variable flow pump, extracting recirculation flow out from the bottom of tank, Facilitate the separative efficiency of adjusting material, density is also very close to the density of cleaning fluid used.
In addition, sieve unit enables to the pollutant pumped by removal tool to be retained and is separating ejected wash water It is recycled in tank, to reduce the consumption of process water, and significant simplifies system.
Detailed description of the invention
With reference to attached drawing, from being described below it will be clear that this method and cleaning and separation equipment these and it is further special It seeks peace advantage, in which:
Fig. 1 and 2 is cleaning according to the present invention and two different views of separation equipment；
Fig. 3 is the longitudinal sectional view of III-III line according to fig. 2；
Fig. 4 is another longitudinal stereoscopic cross-sectional view of IV-IV line according to fig. 2；
Fig. 5 shows the amplification details of Fig. 4；
Fig. 6 is the top view of equipment according to the present invention；
Fig. 7 is to be related to the block flow diagram of cleaning and separation method according to the present invention.
Specific embodiment
It is following to disclose for cleaning plastic material P and the therefrom equipment 1 of separation polluter C with reference to attached drawing.
Equipment 1 includes cleaning container 2, and cleaning container 2 is provided with stirrer tool 3 and is suitable for receiving cleaning fluid W's First-class FINAnd the plastic material P including pollutant C, to carry out the first separating action.
Stirrer tool 3 is configured to generate turbulences movement, is adhered to being separated by mechanical action from plastic material P The part of contaminated materials C on it.
Cleaning container 2 is defined in lower section by the first bottom 4, wherein the first bottom 4 is suitable for receiving the of heavier pollutant C A part of X1.
Cleaning container 2 is provided with valve in lower section or pumps the removal device 13 of type, is used to periodically remove and is deposited on The first part X1 of pollutant C on first bottom 4.
Equipment 1 includes knockout drum V in the downstream of cleaning container 2S, knockout drum VSIncluding be sequentially placed one by one One chamber 5 and second chamber 7.
First chamber 5 is configured to receive the cleaning with floating plastic material P from cleaning container 2 by overflow The second F of fluid W2, to carry out the second separating action.
First chamber 5 can be internally provided with other stirrer tool 12, which is arranged for Generate turbulent flow movement, the other pollutant C for being mechanically decoupled on the fragment that may adhere to plastic material P.
First split cavity 5 includes the second bottom 6 in lower section, and the second bottom 6 is suitable for receiving second of precipitating pollutant C Divide X2.
First split cavity 5 can be set valve or pump the corresponding removal device 14 of type, be suitable for from above-mentioned second Periodically extract the second part X2 of pollutant C out in bottom 6.
Second chamber 7 is contoured for receiving the of the cleaning fluid W of the floating plastic material P from first chamber 5 Three stream F3, to carry out third separating action.
There is outlet 11 in second chamber 7, by the outlet 11, the cleaning fluid W's with processed plastics P' Flowing out stream FOUTIt is discharged by overflow.
Equipment 1 is provided with rotation tool 9, which is configured to be convenient for plastic material P under floating state from first Chamber 5 proceeds to second chamber 7 and proceeds to outlet 11 from second chamber 7.
Rotation tool particularly includes multiple rollers with horizontal axis or drum element 9, is set as moulding transverse to floating Expect the progress path of material P.
Multiple roller elements 9 are along knockout drum VSLongitudinal size DLIt is uniformly distributed.
Roller element 9 includes multiple baffles 10, and baffle 10 slightly passes through below Free Surface L when rotated, along propulsion Path pushes floating plastic material P.
Equipment 1 is provided with supply unit GC, it is arranged for making third stream F3Second chamber is proceeded to from first chamber 5 7。
Supply unit GCIncluding solving poly- promotion tool 15, being configured to the floating agglomerate of depolymerization plastics P and being used for Third stream F is pushed down in second chamber 73Further from the Part III X3 of plastic material P separation pollutant C.
More precisely, solving poly- promotion tool includes multiple helical transport units 15, it can be around relative to vertical axis The inclined rotation axis A of lineRRotation, and can be driven by respective motors 18.
Helical transport unit 15 is included in corresponding conduit 16, and conduit 16 protrudes from inside second chamber 7.
Helical transport unit 15 and corresponding conduit 16 are along knockout drum VSEntire width dimensions DWDistribution, so as to across Water and the third stream F of plastic material P are more defined in the range of first chamber 5 and second chamber 73Mandatory forward.
Equipment 1 includes extracting and recycling tool 17 and sieve unit U outS, wherein extraction and recycling tool 17 are suitable for Knockout drum VSLower section extraction includes the recirculation flow F of the pollutant C of cleaning fluid W and precipitatingR, sieve unit USSuitable for receiving Above-mentioned recirculation flow FRTo retain its pollutant C and cleaning fluid W be back to knockout drum VS.
Extraction and recycling tool 17 include variable flow pump 19 and recirculation circuit 20, and recirculation circuit 20 is from knockout drum VSBottom section extend to positioned at sieve unit USThe upstream region 21 of top, and from sieve unit USDownstream area 22 It extends to and is located at knockout drum VSThe top area 23 of top.
Particularly, recirculation circuit 20 includes the first conduit 20A that upstream region 21 is extended to from third bottom 8, and From sieve unit USDownstream area 22 project to the return conduit 20B in aforementioned top region 23.
By means of the block diagram of Fig. 7, cleaning according to the present invention and separation method are disclosed, by just disclosed equipment 1 actuating.
From being reduced to compared with fractionlet (size is from several millimeters to several centimetres) and plastics after the consumption including pollutant C The pre-cleaning of waste and the plastic material P of grinding flow F with entering for cleaning fluid WIN(such as with possible additive Water) it is loaded in cleaning container 2 (box S1) together.
There is the first separation (box S2) inside container 2, wherein the first part X1 of pollutant C is deposited to first On bottom 4, and by the second F of the water W with plastic material2It is transferred to the first split cavity 5 (box S4).
The first part X1 of the pollutant C on the first bottom 4 is deposited on by valve or is pumped removal device 13 weeks of type It is discharged (box S3) to phase property.
During the process, it is suitable for promoting the revolving speed driven roller of plastic material P or drum element 9, plastic material P is kept In 2 inside of cleaning container and knockout drum VSInside continues to obtain the required time of required purity and degree of purification.
Input F is adjusted according to " refreshing " degree needed for cleaning fluid WINStream and output FOUTStream.
Correctly " refreshing " degree is by the purity and degree of purification of consideration target and the specific economy for needing to meet Property determines.
The speed of roller or drum element 9 can be according to the flow of input/output stream and in order to obtain the plastic material P's of processing Desired purity is adjusted.
In the High variation degree of cleaning fluid W, therefore entrance and exit flow with higher and stronger overflow effect Under the operational circumstances of fruit, roller element 9 slows down the stream of output plastic material, contrast fluid for the output stream relative to fluid W Towing fluid dynamic act and plastic material P gradually made to proceed to next chamber arrival outlet port 11 from a chamber.
In the reduced entrance and exit flow with fluid W, and the therefore operation of the overflow of reduction and towing effect In the case of, roller element 9 executes towing effect, facilitates plastic material and proceeds to outlet port 11.
In the inside of first chamber 5, the second part X2 of pollutant is precipitated, and can be filled by the removal of valve or pump type It sets 13 and is periodically removed (box S5).
(box is shifted from first chamber 5 by the plastic material P that supply unit Gc disclosed above will be cleaned further S6 second chamber 6) is arrived.It, can be in about 100rpm to about according to the feature of specific process requirement and material to be processed The helical transport unit 15 rotated under the revolving speed of 150rpm, for destroying inevitably formed plastics material during processing The floating agglomerate of material.
The block of plastic material is floated by tempestuously depolymerization and opening, and is pushed certain depth entered in second chamber 7 Place, so that pollutant C is promoted in the deposition of bottom, and the plastic material with smaller specific gravity rises to surface and then passes through Overflow is discharged from outlet port 11.
Due to the strong movement of helical transport unit 15, the agglomerate for floating plastic material is reduced to single fragment (institute " thin slice " or " clast " of meaning), it can benefit from the biggish contact surface with cleaning fluid, from achievable cleannes With advantage from the point of view of angle.Certainly, this makes it possible to handle a greater amount of plastic materials using same amount of water P, or vice versa, the water needed for being reduced when suitably handling the plastic material P of certain volume.In all situations Under, resulting economic advantages are obvious.
Box S7 shows cleaning fluid W extraction, filtering and recirculation step.
Variable flow pump 19 is taken out from the bottom (in this case from the third bottom 8 of the second split cavity 7) of knockout drum Recirculation flow F outR, help to be the separative efficiency for being also very close to the material of density of cleaning fluid used to density It is adjusted.
By the recirculation flow F of the Part III X3 including pollutantRIt send to the sieve unit U of vibrationS。
Sieve unit USRetain pollutant C, and filtered fluid W returns to knockout drum V by return conduit 20BSIt is interior Portion.
It persistently clears the pollution off C since this configuration is ensured from cleaner bath, to maintain the more high-quality of cleaning fluid W Amount, is accordingly used in water consumed by cleaning process and substantially reduces.
From the content for having disclosed and being shown in the accompanying drawings it can be clearly seen that according to the method for the present invention with cleaning and Separation equipment successfully realizes setting target.
The above method and equipment can obtain easily higher level in recycled plastic material within the processing time of reduction Purity, this is attributed to the fact that from cleaning container 2 and from knockout drum VSChamber 5 and 7 in immediately continuously remove pollutant C.
Due to the plastics P executed by helical transport unit 15 floating " raft " it is broken, opened from pollutant, cleaning and point The efficiency of single fragment from plastic material P is significantly improved.
Push down on water and plastic material promote pollutant C in the deposition of the bottom tank Vs, and pump 19 pump action with Sieve unit USFilter action synergistically combine, it is ensured that pollutant C constant and continuously remove, be maintained at cleaner bath Under good operating condition.
It is achieved that such purpose, that is, provide it is a kind of functionally with it is simple in structure but can reduce general technology Cost and the efficient solution for ensuring to separate pollutant with plastic material to be recycled.
It should be appreciated that the content with shown in reference to described in attached drawing, is merely illustrative this method and cleaning and separation equipment General features；It therefore, can be to this method, whole equipment or part thereof while being held in the scope of the claims Carry out other modifications or modification.Particularly, can be needed based on specific operation and material to be processed properly select and/or Optimization constitutes geometrical construction, size, position and the material of one or more components of cleaning equipment.

Claims (18)

1. method of the one kind for cleaning plastic material (P) and for therefrom separating polluter (C), comprising the following steps:
A., the first-class (F of cleaning fluid (W) is provided into cleaning container (2)IN) and plastics including the pollutant (C) Material (P), movement is in the cleaning container (2) to generate turbulences movement for stirrer tool (3), to pass through mechanical action The part that the contaminated materials (C) on the plastic material (P) will be attached to is separated from the plastic material (P), so that heavier The first part (X1) of pollutant (C) is deposited on the first bottom (4) of the cleaning container (2), to carry out the pollution First separating action of object (C),
B. there will be the second (F of the cleaning fluid (W) of floating plastic material (P) by overflow2) from the cleaning container (2) It is transferred to knockout drum (VS) first chamber (5), wherein the second separating action is heavy along with the second part (X2) of pollutant (C) It forms sediment to the second bottom (6) of the first chamber (5) and occurs,
C. there will be the third stream (F of the cleaning fluid (W) of floating plastic material (P)3) from the first chamber (5) it is transported to institute State knockout drum (VS) second chamber (7), and by overflow will clean fluid (W) output stream (FOUT) and processed plastics Material (P') is discharged together, wherein provided in the transmission from the first chamber (5) to the second chamber (7),
D. the floating agglomerate of depolymerization plastic material (P), and in the introversive third stream (F of the second chamber (7)3) and plastics Material (P) applies downward pushing action (T), by the way that the Part III (X3) of pollutant (C) is deposited to second chamber Promote third separating action on the third bottom (8) of room (7),
E. from the knockout drum (VS) lower section will include cleaning fluid (W) and precipitating pollutant (C) recirculation flow (FR) go It removes, and by the recirculation flow (FR) give to separating screen unit (US) to retain the pollutant (C) and by the cleaning fluid (W) knockout drum (V is returned toS)。
2. according to the method described in claim 1, wherein, advance of the plastic material (P) under floating state is by trunnion axis Line rotates tool (9) and promotes, and horizontal axis rotation tool (9), which is provided with, is placed on the baffle of Free Surface (L) nearby (10), the second chamber (7) onto shifted the plastic material (P) from the first chamber (5) by rotation and from described Second chamber (7) shifts outlet port (11) by overflow.
3. method according to claim 1 or 2, wherein in the knockout drum (VS) the first chamber (5) in, pass through Other stirrer tool (12) provides other turbulences step, is attached to the broken of plastic material (P) to be mechanically decoupled Any other pollutant (C) of on piece.
4. method according to any of the preceding claims, wherein pass through rotary auger conveyor tool (15), plastics The floating agglomerate of material (P) is depolymerizated, and is pulled to the inside of the second chamber (7) together with cleaning fluid (W), The auger conveyor tool (15) has relative to the inclined rotation axis (A of vertical axisR), the auger conveyor tool (15) it is included in and protrudes from the internal corresponding pipe (16) of the second chamber (7).
5. according to the method described in claim 4, wherein, the auger conveyor tool (15) and the conduit (16) are along institute State knockout drum (VS) entire width dimensions (DW) distribution, so as to fixed across the first chamber (5) and the second chamber (7) Adopted third stream (F3) mandatory forward.
6. method according to any of the preceding claims, wherein the recirculation flow (FR) from the knockout drum (VS) Bottom be pumped, to be sent to sieve unit (US), the sieve unit (US) vibrate to retain and remove the pollutant (C) and by the cleaning fluid (W) it is sent into the knockout drum (VS) in.
7. according to the method described in claim 6, wherein, the recirculation flow (FR) from the third of the second chamber (7) Bottom (8) is removed, also, by the sieve unit (US) filtering the cleaning fluid (W) from top back to described the Two chambers (7) or the knockout drum (VS) the first chamber (5).
8. method according to any of the preceding claims, wherein the first part (X1) of pollutant (C) passes through Valve or the first removal device (13) for pumping type are periodically removed from first bottom (4), and wherein, pollutant (C) The second part (X1) by valve or pump type the second removal device (14) periodically gone from second bottom (6) It removes.
9. method according to any of the preceding claims, wherein the plastic material has and the cleaning fluid (W) specific gravity is about the same or the smaller specific gravity of specific gravity than cleaning fluid (W).
10. one kind is for cleaning plastic material (P) and the therefrom equipment of separation polluter (C), comprising:
It is provided with the cleaning container (2) of stirrer tool (3), is suitable for receiving the first-class (F of cleaning fluid (W)IN) and packet The plastic material (P) of the pollutant (C) is included, to carry out the first separating action, the stirrer tool (3) is configured to use It acts in generating turbulences to separate the portion of contaminated materials (C) attached thereto from plastic material (P) by mechanical action Point, the cleaning container (2) is defined in lower section by the first bottom (4), is suitable for receiving the first part of heavier pollutant (C) (X1),
Knockout drum (VS) comprising the first chamber (5) and second chamber (7) placed in succession,
The first chamber (5), which is configured to receive by overflow, has floating plastics material from the cleaning container (2) Expect the second (F of the cleaning fluid (W) of (P)2), to carry out the second separating action, and including being suitable for receiving pollutant (C) The second bottom (6) of second part (X2),
The second chamber (7), which is contoured for receiving, has floating plastic material (P) from the first chamber (5) Cleaning fluid (W) third stream (F3), to carry out third separating action, and outlet port (11) are provided with, will pass through Output stream (the F of cleaning fluid (W) of the overflow discharge with processed plastic material (P')OUT),
It is used for the third stream (F3) supply unit (GC) comprising solve poly- promotion tool (15), the poly- promotion work of solution Tool (15) is configured to the floating agglomerate of depolymerization plastic material (P) and for internal downwards in the second chamber (7) It forces to push the third stream (F3), further to separate the Part III of pollutant (C) from the plastic material (P) (X3),
Extraction and recycling tool (17), are suitable for from the knockout drum (VS) extraction include cleaning fluid (W) and precipitating Recirculation flow (the F of pollutant (C)R),
Sieve unit (US), it is suitable for receiving the recirculation flow (FR) with retain the pollutant (C) and be configured to by It cleans fluid (W) and returns to the knockout drum (VS)。
11. equipment according to claim 10, wherein the poly- promotion tool of solution includes auger conveyor tool (15), The auger conveyor tool (15) can be around rotation axis (AR) rotation, the rotation axis (AR) relative to vertical axis Inclination, the auger conveyor tool (15), which is included in, to be protruded from the internal corresponding pipe (16) of the second chamber (7).
12. equipment according to claim 11, wherein the auger conveyor tool includes multiple auger conveyor units (15), the multiple auger conveyor unit (15) can be driven by motor (18) and is included in corresponding conduit (16), The auger conveyor unit (15) and corresponding conduit (16) are along the knockout drum (VS) entire width dimensions (DW) Distribution, to define third stream (F across the first chamber (5) and the second chamber (7)3) mandatory forward.
13. equipment according to any one of claims 10 to 12, wherein the extraction and recycling tool (17) include Variable flow pump (19) and recirculation circuit (20), the recirculation circuit (20) is from the knockout drum (VS) bottom section prolong It reaches and is located at the sieve unit (US) above upstream region (21), and from the sieve unit (US) downstream area (22) it extends to positioned at the knockout drum (VS) above top area (23).
14. equipment according to claim 13, wherein the recirculation circuit (20) includes the first conduit (20A) and returns It returns conduit (20B), first conduit (20A) extends to the upstream region (21), the return conduit from third bottom (8) (20B) is from the sieve unit (US) the downstream area (22) be projected into the top area (23).
15. equipment described in any one of 0 to 14 according to claim 1 further includes rotatable tool (9), the rotatable work Having (9) has horizontal axis, and is provided with and is placed on the baffle (10) of Free Surface (L) nearby, and be configured to promote The plastic material (P) under floating state from the first chamber (5) proceeds to the second chamber (7) and from described second Chamber (7) proceeds to outlet port (11) by overflow.
16. equipment according to claim 15, wherein the rotatable tool includes multiple rollers or rouses element (9), described Multiple rollers or drum element (9) are arranged as the progress path transverse to floating plastic material (P), and the multiple roller or drum Element (9) is along the knockout drum (VS) longitudinal size (DL) be uniformly distributed.
17. equipment described in any one of 0 to 16 according to claim 1, wherein in the knockout drum (VS) first chamber The inside of room (5) provides other stirrer tool (12), for generating turbulent flow movement, is attached to plastics to be mechanically decoupled Possible other pollutant (C) on the fragment of material (P).
18. equipment described in any one of 0 to 17 according to claim 1 further includes valve or the first removal device for pumping type (13) and the second removal device (14) of valve or pump type, first removal device (13) are placed on first bottom (4) Periodically to remove the first part (X1) of pollutant (C), second removal device (14) is placed on described for lower section The second part (X2) of pollutant (C) is periodically removed below second bottom (6).
CN201780081177.0A 2016-12-28 2017-12-27 Method and apparatus for cleaning plastic material Pending CN110114152A (en)

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IT102016000131842A IT201600131842A1 (en) 2016-12-28 2016-12-28 METHOD AND APPARATUS FOR WASHING PLASTIC MATERIALS
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PCT/EP2017/084646 WO2018122264A1 (en) 2016-12-28 2017-12-27 Method and apparatus for washing plastics materials

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EP3562599B1 (en) 2021-07-21
JP2020514025A (en) 2020-05-21
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PL3562599T3 (en) 2022-01-10
ES2894658T3 (en) 2022-02-15

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